UPDATE: Patrick Mooney of CSNChicago.com reports that it’s a done deal at four years and $52 million, with an official announcement coming once Jackson passes a physical exam.

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Late last night the Cubs were said to be the “frontrunner” for Edwin Jackson and now Buster Olney of ESPN.com reports that the two sides are closing in on a four-year, $52 million deal.

After failing to land a huge contract as a free agent last offseason Jackson opted for a one-year, $11 million deal from the Nationals, who oddly did not make him a one-year, $13.3 million qualifying offer that would have guaranteed them a first-round draft pick when he signed elsewhere. Instead the Nationals replaced him with Dan Haren for one year, $13 million and will now let Jackson walk for nothing.

Jackson’s numbers were similar to 2011, but for whatever reason he drew significantly more interest this time around. His overall production and strikeout rates have never quite matched his raw stuff, but Jackson’s started at least 30 games in six straight seasons despite being just 29 years old.

During the past three seasons he made 94 starts and threw 599 innings with a 4.10 ERA. Over that same period Anibal Sanchez–who the Cubs reportedly thought they had signed for five years and $75 million–made 95 starts and threw 587 innings with a 3.70 ERA. Given those numbers and the fact that Sanchez was helped by more pitcher-friendly environments $52 million for Jackson seems reasonable after Sanchez got $80 million from the Tigers.

Jon Heyman of FanRag Sports reports Thursday that the Orioles “are said to have begun fielding calls of interest” on superstar Manny Machado and “are close to the point of seriously weighing whether to trade him.”

You’d think it would be a no-brainer for the last-place O’s to flip Machado — an impending free agent — for prospects, but Heyman notes there is “still a question whether or not longtime Orioles owner Peter Angelos” will give the go-ahead. One person familiar with the situation put it a “50-50” likelihood. Another suggested that it would take a massive return, which, sure.

Machado entered play Thursday with a sensational .328/.405/.635 batting line, 15 home runs, and an MLB-leading 43 RBI in 49 games. It’d be a real shock if he’s still wearing an O’s uniform by the end of July.

Heyman reported previously that at least nine teams made aggressive plays for Machado this winter, including the Cubs, Phillies, Dodgers, Indians, Diamondbacks, Yankees, Red Sox, White Sox, and Cardinals. A whole lot of those teams still make sense here in late May — maybe all of them except the White Sox.